<template>
  <div>
    <!-- 导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeTable"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
      >
        <!--是否有效  -->
        <template v-slot:isok="scope">
          <i
            :class="scope.row.cat_deleted ? 'el-icon-error' : 'el-icon-success'"
            :style="scope.row.cat_deleted ? 'color:red' : 'color:green'"
          >
          </i>
        </template>
        <!-- 排序 -->
        <template v-slot:order="scope">
          <el-tag size="mini" v-if="scope.row.cat_level == 0">一级</el-tag>
          <el-tag
            size="mini"
            v-else-if="scope.row.cat_level == 1"
            type="success"
            >二级</el-tag
          >
          <el-tag size="mini" v-else type="warning">三级</el-tag>
        </template>
        <!-- 操作 -->
        <template v-slot:opt="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini"
            >编辑</el-button
          >
          <el-button type="danger" icon="el-icon-delete" size="mini"
            >删除</el-button
          >
        </template>
      </tree-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total,sizes,prev,pager,next,jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 主体区域 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="80px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            :options="parentCateList"
            :props="cascaderProps"
            v-model="selectedKeys"
            @change="parentCateChanged"
            clearable
          ></el-cascader>
        </el-form-item>
      </el-form>

      <!-- 底部按钮 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取消</el-button>
        <el-button @click="addCate">确定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],
      total: 0,
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      columns: [
        { label: "分类名称", prop: "cat_name" },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
        ],
      },
      parentCateList: [],
      cascaderProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        expandTrigger: "hover",
      },
      selectedKeys: [],
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      if (res.meta.status != 200)
        return this.$message.error("获取商品分类失败");
      this.catelist = res.data.result;
      this.total = res.data.total;
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },
    showCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 },
      });
      if (res.meta.status != 200)
        return this.$message.error("获取父级分类失败");
      this.parentCateList = res.data;
    },
    parentCateChanged() {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status != 201) return this.$message.error("添加分类失败");
        this.$message.success("添加分类成功！");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_level = 0;
      this.addCateForm.cat_pid = 0;
    },
  },
};
</script>

<style lang="less" scoped>
.treeTable {
  margin-top: 15px;
}
</style>